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I I I I I I I I I I I I I I I I I I I n'" :"',..';.11,..... .o' :'. ') I. INTRODUCTION When one has a bit of extra time available, opportunities frequently present themselves. One such opportunity arose in ~ht fall of 1982, and it said, "Let's make better use of our littl~ computer." We acknowledged that a highly desirable use of our computer ~ould be to do away with laboriously tedious and error-" prone analyses of river call data. Thus, we then began to "put the river call data on the computer." This really means that y.: decided to create a data file to contain divisional call records and further, that we decided to create specialized, yet general-: application, software to expedite our analyses of call records. The remainder of the discussion in this appendix, therefore, deals with the creation of a computerized, call data file and th,~ developmertt of useful software for analysis of call data. II. CREA;ION OF THE DATA FILE The ,uestion of how to create the data file may sound mundane, but this subject has an important bearing in the organi~ zation and flexibility of the software programs to follow. But first, perhaPS it is wise to discuss "call data" as a generic term and to describe briefly some of the types of analyses and interpretations which relate to call data. What's a CaLL and What's a CaLL Reeo~d? Form~l call data are kept by the Division Engineers for Water Division I (South Platte River Basin) and for Water Division crI (Arkansas River Basin). Such data exist from 1941 ~o present for Division I, and from 1967 to present for Division I~. In each c~se, these records represent the controlling divisional A-l 1, ,1,'1 't, i! ',~; ',:; it ,~~ j' :~I ;'1 '.'1 " ;'